Search results for "Double-layer capacitance"

showing 2 items of 2 documents

Impedance and admittance characteristics of Bi2S3 nanowire arrays

2013

Current studies of the electrical impedance and admittance characteristics of the anodised aluminum oxide (AAO) nanoporous arrays and bismuth sulphide (Bi2S3) nanowire within AAO membranes are presented. The influence of potential and frequency scan rate effect produced on the real, imaginary and complex electrochemical impedance and double layer capacitance of the AAO nanopore and the Bi2S3 nanowire arrays were studied.

Horizontal scan rateAdmittanceMaterials sciencebusiness.industryNanoporousDouble-layer capacitanceNanowirechemistry.chemical_elementNanotechnologyBismuthNanoporechemistryOptoelectronicsbusinessElectrical impedanceIOP Conference Series: Materials Science and Engineering
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Characterization of LiFePO4/C Composite Thin Films Using Electrochemical Impedance Spectroscopy

2012

The composite LiFePO4/C thin films were prepared on steel substrate by radio frequency (RF) magnetron sputtering. Electrochemical properties of the obtained thin films were investigated by cyclic voltammetry charge-discharge measurements and electrochemical impedance spectroscopy (EIS). The films annealed at 550 °C exhibited a couple of redox peaks at 3.45 V vs. Li/Li + characteristic for the electrochemical lithium insertion/extraction in LiFePO4. At low current rate such composite thin film showed a discharge capacity of over 110 mAh g -1 . The dependence of charge transfer resistance, double layer capacitance and lithium diffusion coefficients on applied electrode potential were calculat…

Materials sciencechemistrySputteringDouble-layer capacitanceAnalytical chemistrychemistry.chemical_elementLithiumSputter depositionThin filmCyclic voltammetryElectrode potentialDielectric spectroscopyIOP Conference Series: Materials Science and Engineering
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